Lath-stripping machine.



No. 764,106. PATENTED JULY 5, 1904.

N. H. BOLTON. LATH STRIPPING MACHINE.

APPLIOA'IION FILED JUNE 1a, 1902.

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N. H. BOLTON.

' LATH STRIPPING MACHINE.

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PATENT OFFICE.

LATH-STRIPPING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 764,106, dated July 5, 1904.

A h ati fil d June 16, 1902. Serial No. 112,000. (No model.)

To all whom it may concern:

Be it known that I, NEWTON H. BOLTON, a citizen of the United States, conducting business at No. 166 WVestern avenue, in the city of Minneapolis, county of Hennepin, and State of Minnesota, have invented new and useful Improvements in Lath-Stripping Machines, of which the following is a specification.

My invention relates to lumbering; and it consists in improvements in sawing-machines used in the production of laths, which improvements are more fully described hereinafter.

In the production of laths waste from the logs (slabs) are generally used. These are cross-cut by a machine designed for that purpose into blocks four feet long, which blocks are in turn divided longitudinally by another machine into planks about one and one-half inches thick, technically called bolts, which bolts in turn are subdivided longitudinally by still another machine into slats about three-eighths of an inch thick, technically called laths. Thus three different machines are employed in the production of lathsviz. the crosscut-saw, which converts the slabs in to blocks, the lath-bolter, which converts the blocks into bolts, and the lath-stripper, which converts the bolts into laths.

My present invention relates to the lastnamed machine, the lath-stripper; and it consists, first, in an improved gage for guiding the bolts in their course to and the laths in their course from the saws; second, in improved pressure-feed rolls, and, third, in improved means for preserving parallelism of the feed-roll shafts, all of which is hereinafter fully described.

My invention is illustrated in the accompanyingdrawings, in which Figure 1 is a front elevation; Fig. 2, a side elevation; Fig. 3, a rear elevation; Fig. 4, a top view; and Fig. 5, a detail view, on an enlarged scale and partly in section, of a portion of the machine.

Similar letters refer to similar parts throughout the several views.

A is the frame; B, the arbor; O, the saws; D, the table; E, the guide; F, the feed-roll mechanism, and G the driving-shaft.

The frame A, arbor B, and saws O are not unlike those commonly used, and as they form no part of my invention I do not deem it necessary to describe them herein.

The table D is an important feature of my invention. It consists of a horizontal bar (4, having a longitudinally-extending upwardlyturned flange 7). The horizontal portion a is mounted upon and supported by the vertical adjusting-bolts c, which bolts are secured to its under side, extend downward therefrom, and pass loosly through a flange or ledge (Z of the frame A. These bolts (preferably four in number) are furnished with adjusting-nuts a, through the use of which the table D is adjusted to height.

The guide E is another important feature of my invention. It consists of a horizontal bar resting upon the horizontal portion of the table D and adjustably afiixed to the vertical or flange portion Z) thereof, the manner of its attachment thereto being a novel feature. This guide E is laterally pierced intermediate its length, having a hole (preferably) midway between its opposite ends and two other holes, one near each of its ends. Thesevholes are threaded, thereby adapting them to receive the stud-bolts f, which bolts are screwed into the said guide from its rear side (the side toward the flange b) and each provided with two adjusting-nuts g and g. The flangeb of the table D in like manner is laterally piercedthat is to say, is pierced horizontally the three perforations therein being in register (in line) with the lateral perforations in the guide E. These holes are not threaded, but are large enough to receive the threaded stud-bolts f freely. In effecting the attachment of these parts (the guide E and flange b) the outer adjusting-nuts g are removed from the bolts f and those portions of the said bolts extending outward and beyond the remaining nuts 1 passed through the laterally-pierced flange b, when the adjusting-nuts g are replaced there on. The part E (the guide) is now arranged parallel With the part Z) (the flange) and the adjusting-nuts g screwed up against both sides of the flange b, after which the adjusting-nuts g and g of the middle bolt f (the one midway between the ends of the guide E) remain undisturbed. In adjusting the guide E the nuts g of the end boltsf are respectively loosened, and the nuts 9, impinging the front side of the said flange, are tightened, thereby deflecting either end of the said guide E, (through its flexibility,) the ends being thus sprung rearward, thus giving the guide E clearance.

The feed-roll mechanism F is still another important feature of my invention. It consists of the frames it, mounted upon and (to a degree) laterally adjustable upon the larger or main frame A; the boxes or bearingsi, located and vertically adjustable within the said frames 72 the shafts j and j, journaled in and vertically movable with the said boxes vi; the stud-bolts 7c, affixed in the said boxes '2 and extending upward therefrom through the upper sides of the said frames h; the clamp-nuts Z, screwed upon the said stub-bolts in; the vertically-pierced brackets 11/, affixed to the in ner side walls of the said frames lb; the threaded rods a, passing loosely through said brackets and having their threaded ends extending upward and downward through the said brackets m; the coiled springs r), encircling the said rods 0;, said springs resting upon the upper sides of the nuts on the said lower end of said rods, the upper ends of the springs bearing against the lower sides of the said brackets m; the laterally-pierced horizontal bar 7), mounted upon the upwardly -extending threaded stud-bolts k of the boxes 71; the upwardly-extending rods a; the clamp-nuts q, screwed, upon the said upwardly-extending stud-bolts 7:: and the said rods 12, and the feed-rolls affixed upon the said shafts j. The purpose of this construction is to automatically give a pressure upon the feed-rolls 9, thus equalizing their pressure upon bolts of varying thickness. It will readily be seen that the tension of the springs u may be changed (increased or decreased) by turning down or turning up the clamp-nuts g.

The means for preservingparallelism of the feed-roll shafts j is yet another important feature of my invention. It consists in pivotally affixing one end (preferably the rear end) of one of the feed-roll frames 71 to the larger or main frame A by slotting the holes through which the bolts pass that secure the frame it to the main frame A and by providing the lateral adjustment of its opposite end, (the front end,) which lateral adjustment is effected by means of the horizontal adjustingbolts s. This bolt, like the vertical adjustingbolt 0, is threaded throughout the greater part of its length. It is passed loosely through a lug t, affixed upon the frame A, and is screwed into the laterally pierced and threaded side wall of the frame it. It is furnished upon each side of the lug t, through which it passes, with an ad justing-nut a, through the use of which the forward end of the frame it may be drawn toward or forced from the said lug t, thereby adjusting the feed-roll shaft 7' and bringing it into parallelism with its fellow feed-roll shaft The adjustment of these adjusting or clamp nuts a is substantially as described in connection with the vertical adjusting-bolts 0 and the horizontal adjusting bolts f and needs no repetition.

The driving-shaft G extends through the frame longitudinal, and hence parallel, with the feed-roll shafts 7' and 7". It is furnished intern'iediate its length with the band-wheel '22 and at its rear end with the pulley w. A driving-belt a transmits accelerated motion to the pulley 1 on the saw-arbor B, and a similar belt m transmits retarded motion to the band-wheels on the feed-roll shafts j and 7".

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a lath-stripping machine, the combination with the frame adapted to support the working parts, an arbor journaled and rotatable therein, saws mounted upon and rotatable with the said. arbor, a feed-roll for forcing the bolts forward to the said saws, clearing-rolls for carrying the laths away from the said saws, of the feed-roll mechanism Fembodying the stud-bolts 7r affixed in the boxes carrying the shafts of the said rolls, the horizontal bar 19 through which the said bolts k extend, and the springs 0 intermediate the said frame and the said horizontal bar substantially as shown, and for the purpose specified.

2. In combination with the saws and the means for operating the same, a pair of frames, bearings adjustably mounted in said frames, feed-rolls journaled in said bearings, and bars extending across the top of said frames and being connected with the bearings arranged therein, means for adjusting said bars, bolts or rods extending through the said bars and springs encircling said rods, substantially as and for purpose specified.

NEINTON H. BOLTON.

\Vitnesses:

H. J. WVA'I'ERS, O. E. MoEN. 

